Number of nX7 0..1 arrays with every element equal to 0, 1, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A302679
Number of nX7 0..1 arrays with every element equal to 0, 1, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =21a(1) =23a(2) =94a(3) =217a(4) =661a(5) =2013a(6) =6311a(7) =19497a(8) =60253a(9) =186797a(10) =578385a(11) =1790605a(12) =5545571a(13) =17172267a(14) =53173813a(15) =164661159a(16) =509890659a(17) =1578918645a(18) =4889288817a(19) =15140189411a(20) =46883090855a(21) =145178205375a(22) =449559001303
External references
- oeis: A302679